Cam-action punch press



A l 25, 1939. A. J. ZAVERUKA 2,155,629

CAM-ACTION PUNCH PRESS Filed Sept. 14, 1938 7 Sheets-Sheet l lNVE'NTaRZ ALEX a. zavERu /q.

fi /580W ATTORN E S.

April 25, 1939. A. J. ZAVERUKA CAMACTION PUNCH PRESS Filed Sept. 14, 1958 '7 Sheets-Sheet 2 IN VENTOR: ALEX qznvrgnuw ls April 25, 1939. A. J, ZAVERUKA CAM-ACTION PUNCH PRESS Filed Sept. 14, 19.38

7 SheetsSheet 5 A w w u W v a a a z wm m N v o I n VZ T. N A w m a M O 1 a \1 W 3 Z ///////////v////// M/////////// 4 April 25, 1939. J ZIAVERUKA 2,155,629

CAM-ACTION PUNCH PRESS Filed Sept. 14, 1938 '7 Sheets-Sheet 4 (IIIIIIIIIIIIIJ.

Il/IIIIIIIA lNVENTOR:

I @g Ww ATTORNEY.

ALEX u. ZAVERUKA.

April 25, 1939. J ZAVERUKA 2,155,629

CAM-ACTION PUNCH PRESS Filed Sept. 14, 1938 7 Sheets-Sheet 5 INVENTOFZ: ALEX u. zAvE u KM.

April 25,}939. J ZAVERUKA 2,155,629

CAM-ACTION PUNCH PRES 5 Filed Sept. 14, 1938 7 Sheets-Sheet 6 I INVENTOR: ALEX u. ZAVERLJKA.

ATTORNEY- April 1939. A. J. ZAVERUKA 2,155,629

CAM-ACTION PUNCH PRESS Filed Sept. 14, 1958 '7 Sheets-Sheet 7 INVENTOR: ALEX a.zMv u| A- ATTORNEY Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE 13 Claims.

The present invention relates to improvements in the art of punch presses, and while it is generally known that certain cam-action presses have been used, my purpose is that I produce a earn-action press of an entirely new construction and design, giving new effects in economy and operation not heretofore known in the industry.

Some of the outstanding advantages of my invention are:

Decidedly more smoothness in operation, likewise minimizing frictional resistance in all operating parts; all cumbersome obstructions eliminated, such as fly wheels of great proportions and the like, which are hazards for set up operations; greatly simplified and effortless stroke adjustment; positive automatic lubrication to all vital parts; no operating parts exposed, thereby avoiding the grave danger of exposure of unprotected elements, as in other similar types of presses; far greater accessibility to dies, particularly during the set-up operation, inspection, operation, maintenance and tryout.

With the foregoing in mind, it will become readily apparent that the invention possesses further advantages, all of which will be clearly revealed during the course of the following detailed description, illustrated throughout the accompanying drawings, and more fully pointed out in the appended claims.

With reference to the drawings:

Figure 1 is a reduced side elevation of the complete press with a portion of one of the side walls thereof broken away and exposing certain parts.

Figure 2 is a reduced rear elevation assembly.

Figure 3 is a reduced semi-front elevation assembly.

Figure 4 is a sectional view of the cam operating mechanism shown at precisely the upper dead center thereof.

Figure 5 is a similar view to Figure 4, which discloses the same mechanism in the act of having completed the power stroke and the ram being at its lowermost position.

Figure 6 is a section taken upon line VIVI of Figure 4.

Figure 7 is a side elevation of the principal yoke member; and Figure 8 is a bottom plan view thereof.

Figure 9 is a transverse sectional view of the cam operating mechanism; in this view the clutch assembly is shown normally disengaged.

Figure 10 is a top plan view of the clutch member; and Figure 11 is a section through said clutch member taken upon line XI-XI of Figure 10.

Figure 12 is a sectional view of the clutch assembly showing same normally engaged.

Figure 13 is a section taken upon line IGII XIII of Figure 9.

Figure 14 is a sectional plan view upon line XIV-XIV of Figure 4; and Figure 15 is a side elevation thereof.

Figure 16 is a reduced end elevation of the rocker.

Figure 17 is a section upon line XVIIXV'II of Figure 16.

Figure 18 is a top plan sectional view of the drive shaft assembly taken upon line XV11I- XVIII of Figure 1.

Figure 19 is a sectional view of the stroke adjusting assembly.

Figure 20 is a top plan view of the clutch assembly.

Figure 21 is a section upon line KEG-XXI of Figure 9, showing the clutch normally disengaged; and Figure 22 is a similar view showing the clutch normally engaged.

Figure 23 is an isometric view of the guide post.

Figure 24 is an isometric view of the ram and rocker connecting link.

In further carrying out my invention, all elements described and illustrated with the same but not a part thereof, will be designated by consecutive alphabetical letters, while the invention proper will be characterized by the customary reference numerals.

Throughout the drawings it is understood that a suitable housing of cast material is provided and which has sides A and B, bottom 0, front D, also removable cap E and the use of the customary cap screws for this purpose, all of the formation as indicated. See Figures 1, 2 and 3.

Conventional electric motor F of adequate horse power is provided and is detachably secured to carrier G with the usual cap screws where shown, and referring more particularly to Figures 2 and 3 it is clear that carrier G is pivotally secured to side A as at H and is adjustable by means of slot I within side B, lugs J associated with opposed adjusting screws K as indicated. Drive pulley L is keyed to the main shaft of motor F and has relation with counterbalanced master pulley l by virtue of belt M, and with reference to Figure 18 it is obvious that pulley I is keyed to horizontal shaft 2 the end of which is journaled within bracket 3 by bearing 2A. Elongated bearing 4 within the housing has packing nut 5, and drive gear 6 is keyed and pinned to shaft 2, said gear engages driven gear 1, and the latter gear is keyed and pinned to horizontal sleeve 23 and said sleeve being an integral part shaft 8 which has worm 9 keyed thereto, also thrust bearing I8 where shown. Shaft 8 is journaled within the housing at 8A, 8B and sleeve II, also oil seal l2 for said sleeve is provided as indicated.

Now referring to Figure 13 it is seen that worm 9 engages gear l3, and said gear is double keyed to transverse shaft M, and in Figure 9 it is clear that said shaft is journaled within sides A and B as at MA, also oil sealing caps l5 being provided where indicated. In Figure 4 it is also clear that cam member I6 is freely mounted upon shaft l4, and said member also engages lower frictional roller l1 and upper frictional roller I8.

Roller I1 is journaled within rocker l9 as at ISA, Figure 1'1) and roller I8 is likewise journaled within yoke member 20 as at 20A, and within slot 283 all where shown in Figures '1 and 8.

The stroke of the press is effectively adjustable in the following manner:

In Figures 4 and 19 it is clear that rocker I9 is pivoted to externally threaded vertical shaft 2| by virtue of carrier 2 IA being internally threaded upon said shaft and in Figure 19 it is also clear that horizontal shaft 22 is journaled within of side A, also bevel gear 24 is keyed and pinned to one end of said shaft and the opposite end thereof having threaded portion 22A so as to receive lock nut 25, also square end 223 arranged "upon said shaft for the application of a socket wrench.

Bevel gear 26 is keyed and pinned to shaft 2| and engages bevel gear 24 as indicated, and referring to Figure 4 at this time it is obvious that shaft 2| is journaled within the housing as,

at 2|B, and in cap E as at 2| C.

The clutch unit comprises cam collar 21 which is double keyed to shaft M as at 21A, and thrust collar 28 being disposed intermediate collar 21 and journal MA as indicated. Plunger 29 is freely disposed within cam I6 where shown, it is seen that said plunger is counterbored so as to freely receive spring 30, one end of which bears upon the end of the counterbore. In Figure 9 plunger 29 normally engages cam surface 21B of collar 21, and is provided with extended lug 29A, and said lug normally engages finger 3| and said finger is keyed to shaft 32, (Figures 20, 21 and 22) said shaft is journaled within sides A "and B, and lever 33 is keyed to said shaft as in Figure 1. It is also noted that coil spring 34 bears upon finger 3| at all times, as in Figure 5.

Referring to Figures 5' and 6, it is seen that yoke member 20 is pivotally secured to rocker |9 by virtue of pin 35 and is adjustably related therewith through studs 36 and coil springs 31, said springs disposed within counterbored lug 20C of said yoke member. Stud 36 threadedly engages rocker |9 as shown. Ram 31 has direct connection with rocker I9 by means of link 38, and said link is pivoted to said rocker by pin 39, and is likewise pivoted to said ram by pin 40, also square guide post 4| having round portion 4|A being firmly pressed into the housing. The lower portion of ram 31 is provided with socket 31A and set screw 42 coacting with said socket for holding the punch, also bearing 43 for said ram, and packing nut 44 where indicated.

Again referring to ram 31 and Figures 5, 14 and 15, the upper portion of said ram is provided with yoke 31A which is an integral part thereof, and supports pin 40 to which link 38 is pivotally connected. Split block 45 is provided and is clamped upon yoke 31A by means of screw 46 I where shown. A lateral adjustment for block 45 is provided and consists of plates 41 which coast with respective screws 48 with lock nuts 49 for said screws.

The complete operation of the press is as follows:

As previously described, electric motor F is of the conventional type and is of adequate horsepower for the purpose, and being substantially pivoted to the housing it is clear in Figure 2 that adequate means is. provided for absorbing slack in belt M.

It is now understood that motor F drives master pulley and in Figure 18 it follows that said pulley is keyed to horizontal shaft 2, and through gears 6 and 1 horizontal shaft 8 is likewise driven and worm 9 being secured to shaft 8 in Figure 13 it follows that said worm drives transverse shaft M by virtue of gear |3 thereupon. In Figures 4 and 5 it is obvious that shaft |4 normally rotates freely through cam l6, and at all times when the press is neutral or idling.

Referring now to Figure 4 all elements are indicated in a neutral or idling position with, rain 31 lifted to its highest position. The press is operated or trippedby manually depressing,

lever 33 (Figure 1) and inasmuch as said lever secured to shaft 32, and finger 3| beingsecured to said shaft, (Figures 21 and 22) lug 29A.of plunger 29 releases said plunger and the same engages collar 21 from the position of Figure 9 to the position of Figure 12. Collar 21' being I: keyed to shaft I4 it is understood that cam l6 of which plunger 29 is a part thereof is rotatably actuated in the direction of the arrow in Figure 4, intermediate frictional rollers l1 and I8 and with spring tension exerted upon yoke member 20.,

(Figure 6) saidrrl-ember being pivoted to rocker l9 as at 35, link 38 being pivoted to the upper portion of ram 31 with guide post 4| coacting driven downwardly with coordinate elements in the position as shown in Figure 5, and which completes one stroke of the press.

The purpose of cam surface 21B of collar 21 is to permit the end of plunger 21 to follow rotatably around said surface thereby gradually attaining the innermost portion thereof, and at this position said plunger engages step 21C of collar 21 during the operation of the press. Plunger 29 remains engaged with step 21C, of collar 21" and in course of the rotation of cam l6 lug 29A of said plunger contacts bevel portion 3| ,A of plunger 3| thus ejecting the plunger from aforesaid step and returning said cam to neutral with block 45, it is clear that said ram is instantly or idling position with the plunger restored to normal position as indicated in Figures 9,.20 and 21.

An outstanding feature of this press is that the stroke thereof is efiectively adjustable, and

referring at this time to Figures 4 and 19 it is clear that rocker. |9 is pivotally secured to carrier 2|A, and said carrier. threadedly engaging may be moved in a vertical path by releasing lock nut 25 and applying a socket wrench to end 223, V

thence rotatably actuating shaft 22 any degree required, then likewise drawingsaid nut home as v in 1813? .1 P

Having thus fully described my invention, what I claim as new is:

1. In a cam action punch press the combination with a housing having a removably engaged cap and a vertically actuating ram, a cam mechanism comprising a cam freely disposed upon a transverse shaft, a yoke member, a rocker and an outwardly threaded vertical shaft, means whereby said rocker is pivoted to said shaft and is movable thereupon vertically with respect to said shaft, an upper frictional roller and a lower frictional roller, both of said rollers contacting aforesaid cam, means whereby aforesaid yoke member is pivoted to said rocker, and further means with respect to said yoke member and rocker for exerting a spring tension upon said upper roller, thus retaining said cam in direct contact with the rollers aforesaid.

2. In a cam-action punch press the combination with a housing having a removably engaged cap and a vertically actuating ram, a cam mechanism coacting with said ram, said mechanism comprising a transverse shaft, a cam freely disposed upon said shaft, a yoke member, rocker, upper and lower frictional rollers coacting with said cam, an outwardly threaded vertical shaft, said rocker pivoted to said shaft, a yoke upon. the upper portion of said ram, a link pivoted to said yoke and to said rocker, a split block and means for securing same to said yoke.

3. In a cam-action punch press, the combination with a housing and a removably engaged cap for said housing, also a vertically actuated ram, a transverse shaft journaled within said housing, a cam freely disposed upon said shaft, an upper frictional roller and a lower frictional roller, both of' said rollers coacting with said cam, a yoke member and a rocker, means for supporting said upper roller within said yoke member, and means for supporting said lower member within said rocker, means for pivotally connecting said yoke member to said rocker, a stud passing through a counterbored lug upon said yoke member and threadedly engaging said rocker for exerting a constant pressure upon the upper roller aforesaid.

4. In a cam-action punch press, the combination with a housing with a removable cap therefor, also a vertically actuating ram, a yoke member and a rocker pivoted to each other, a yoke upon the upper end of said ram, a link pivoted to said yoke and to said rocker, a split block clamping said yoke, a round bottom and square top guide post fixed with said housing, a pair of freely disposed plates adjacent said block a screw threadedly engaging said block and coacting with said plates, the square portion of said post disposed intermediate aforesaid plates, said plates and screws being for lateral adjustment of the guide post aforesaid.

5. In a cam-action punch press, the combination with a housing and an electric motor, a driving unit for said press, said unit comprising a pulley upon said motor, a horizontal shaft journaled within said housing, a master pulley secured to said shaft and belt engagement of both pulleys named, a gear secured to innermost end of said horizontal shaft, an additional horizontal shaft and a gear secured to same, gears upon both of said shafts engaging each other, a worm secured to the last-named shaft and the shaft journaled within aforesaid housing, also a thrust bearing for said shaft, a transverse shaft coacting with the cam mechanism of the press, a gear secured to said transverse shaft and engaging said worm.

6. In a cam-action punch press, the combination with a housing with a removably engaged cap therefor, a cam mechanism, a rocker for said mechanism, a stroke adjusting unit for said press, said unit comprising a vertically disposed outwardly threaded shaft journaled within said housing and housing cap, a carrier threadedly engaging said shaft, aforesaid rocker pivoted to said carrier,-a bevel gear secured to one end of said shaft, a horizontal shaft with a bevel gear secured thereto, said bevel gears engaging each other, said horizontal shaft journaled within aforesaid housing, also having a square end projecting outwardly of the housing adapted for the application of a socket wrench, also a lock nut threadedly engaging said shaft.

7. In a cam-action punch press, the combination with a housing with a removably engaged cap therefor, a cam mechanism, a rocker coacting with said mechanism, an outwardly threaded vertically disposed shaft journaled within said housing and cap, a carrier threadedly engaging said shaft and means for pivoting aforesaid rocker to said carrier, a horizontal shaft and means thereupon for actuating the first-named shaft, said horizontal shaft journaled within one of the sides of aforesaid housing, means externally of said housing for locking both of said shafts with aforesaid carrier and rocker fixed in a predetermined position with respect to said shafts, in all for the purpose of variably adjusting the stroke of the aforesaid press.

8. In a cam-action punch press, the combination with a housing and a removable cap therefor, a cam mechanism, said mechanism comprising a transverse shaft journaled within said housing, a cam freely mounted upon said shaft; a clutch unit, said unit comprising a collar double keyed to said shaft, a plunger freely disposed within aforesaid cam and a spring within said plunger exerting an outward thrust upon the same with respect to said cam, an additional shaft journaled within said housing, a finger secured to said shaft, a manually operated lever also secured to said shaft and exterior of said housing, an upwardly extended lug upon aforesaid plunger, said lug normally engaging said finger; aforesaid collar having a cam surface upon the face thereof, also a step therein adapted to receive said plunger for engagement with the clutch unit with the cam mechanism shaft aforesaid.

9. In a cam-action punch press, the combination with a housing and a removable cap therefor, a cam mechanism, said mechanism having a transverse shaft journaled within said housing and a cam freely mounted upon said shaft; a clutch unit, said unit comprising a shaft journaled within said housing, a finger secured to said shaft and spring means coacting with the housing and said finger, a collar double keyed to first-named shaft, plunger means associated with spring means coacting with said finger and collar, and manually operated means exterior of aforesaid housing and coacting with the lastnamed shaft for tripping or operating the punch press aforesaid.

10. In a cam-action punch press, the combination with a housing and a vertically actuated ram therein, a cam mechanism, said mechanism having a rocker, means upon the top of said ram for linking said rocker and ram, vertical guide means within said housing for said ram and means coacting with said guide means forlateral adjustment of said ram.

11. In a cam-action punch press, a clutchunit, said unit comprising a transverse shaft, a cam :freely mounted upon said shaft, an additional engaging and disengaging aforesaid cam with respect to the shaft upon which it is mounted.

12. In a cam-action punch press, a cam mechanism, a rocker associated with said mechanism,

a housing and a removable cap thereof, an

outwardly threaded vertical shaft and means for journaling said shaft Within said housing and cap, a horizontal shaft and means for journaling the same within said housing, gear means for connecting both. of said shafts, a carrier threadedly engaging said vertical shaft and means for pivoting aforesaid rocker, manually operated and locking means for aforesaid horizontal shaft, in all constituting a mechanism for variable adjustment of the stroke of the aforesaid punch press.

13. In a cam-action punch press, a. housing and a removable cap therefor, a cam mechanism and a clutch unit associated therewith, said mechanism having a transverse shaft and a cam freely mounted thereupon, said clutch unit having a collar secured to aforesaid shaft and adjacent aforesaid cam, an additional shaft and a finger secured thereto, a plunger within said cam, a step within said cam for engagement with said finger, a bevel portion upon said finger for automatically ejecting said plunger from said collar for disengaging the clutch, also manual means for actuating the last-named shaft.

ALEX J. ZAVERUKA. 

